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@uiten tetes @anni @fitta MIRTILLow R. oLAPP, or NEW Youn, N. Y.,`Ass1GNou`ro mMsELF AND u. P. JONES, or sAMErLAos.

Letters .Patent Na 61,162, dated January 15, ,1867

IMPROVEMENT IN.STEAM GENERATORS. I

TO ALL WHOM IT MAY. CONCERN:

Be it known that I, MIRTILLOW R. CLAPI?, of the city, county, and State of New York, have invented a certain new and useful Improvement on Steam Boilers, of which the following is a full, clear, andexact description, reference being had to the accompanying drawing, forming part of this specification,- and in which- Figure 1 represents a vertical section of a boiler, or main portion of one, having my improvement applied thereto, taken as denoted by the line :v :c in fig. 2.

Figure 2 is a horizontal section of the same through the line a z in iig. 1.

Figure 3 is' a'top view of one of thewater and steam-generating tubes constructed according to my improvoment; and

Figure 4 a transverse section of the same. K

-Like lettersrefer to like parts throughout the several figures.

My invention is mor-c particularly applicable to boilers which have pendent or vertical water tubes descending from a steam-generating chamber above the fireplace down within the latter, and relates more'particularly to that construction of water and steam-generating tubes, iu which diaphragms areuscd to isolate the water into thin films or sheets for the more rapid 'generation of steam, and to establish return passages for water'onrried up by the steam.; and the nature of my invention consists in a novel construction of said tubes, exposed externally to the action ofthe fire, by providing them with diaphragms having'openiiigs iu them, inclining downwardly for the purpose of arresting and diverting down into the return passages of the tubes, water lifted by the steam in the course of its formation or ascension within the passages more directly exposed to the action of the fire; audit also consists .in a triangular arrangement of diaphrag'ms, which may be loosely fitted in the tubes, whereby the diaphragms are made to retain each other in place; likewise in a peculiar bont construction of the diaphragms at their tops to facilitate the returnot' water lifted by the steam.

Referring to the accompanying drawing, A represents the outer shell or case of a vertical cylindrical boiler; B the tire-box or chamber; C the crown-sheet tc the latter; D the upper steam-generating chamber; E the 'smoke-dues, and F the level of the tire-grate. Attached to the crown-sheet C, communicating with the chamber D, and projecting downwards into the fire-chamber, preferably in a lcndent and inclined or lla-ring manner, arc tubos, G. These tubes arereprcsented as of pocket character, being iittcd at their lower ends with solid screwplugs,V but in this respect they may be otherwise constructed; they are thus, however, constructed and the lower portion of the annular space surrounding the iire-box malle .solid to prevent rapid destruction, and to o-bviate 4the necessity of a water base below the grate. Said tubes G are iitted with diaphragms, g, extending upwardly Within them, for the purpose of isolating thewatcr into films or thin sheets, in close proximity to the heating surfaces of the tubes for the morel rapid generation of steam, and return passages, excluded from the direct actionof the heat, to convey back or down water lifted up by the steam formed iu or by the isolated films or sheets, and to keep up thefecd of water to the isolated steam-generating or water spaces Diaphragm arrange ments for these purposes have been variously constructed, and the one portion of my improvements is applicable to different tubular arrangements of such character. This consists in'malring openings, s, in the diaphragme, having at their backs,or insides, formed by bending or inclining the metal out of which they are made, a downward direction or tendency from the isolated steam-generating passages, into the return-water ones, so that water lifted up bythe stcani in the course of its formation and ascension within the' former, will be checked from rising, and caused to ow back downwardly into the return-water passages, to take the piace of the water that has been converted into steam. Openings of this character thus made in the diaphra'glns will tend to check turbulent motion of the water in the boiler and restrain foaming. The diaphragms g I prefer to make of three strips to each tube, litting down within and the length oi' thc latter, and of such width as when inserted to bear at their edges one against the other, giving to the retnrn-witer passages, m, a triangular configuration, and a segmental iig-ure to the isolated water or steam-generating passages, n, and serving, the one strip to' support the other, and retain in their places the several strips. it is a matter of no small importance, too, that the current caused by the esca-pe of steam should offer no obstruction to the flow of water into the return-water passages' at their top, and every facility given for return of water lifted up by the steam. For this purpose the diaphragme are turned or boat at their upper ends so as to lay more against the sides of the tube, and form mouths or receiving spaces at their junction with each other to the return-water passages, as more clearly represented in sg. 4.

What I claim as my invention, and desire to secure by Leiters Patent, i's- 1. The water and steam-generating tubes G, exposed to the action of the ire or heated gases, as specied,

Iand provided with diaphragms g, having openings s in them, inclinng downwardly, substantially as and for the purpose or purposes herein set forth. p v

2. yJhe construction oi' the diaphragme y, within the tubes Gr, whereby they support or retain eachother MIRTILLOW R. CLAPP.

in plaee,v as dcscrib ed.

Witnesses:

A. Ln CLERC, G.v W. REED. 

